Rb2S

Rubidium sulfide is a thermodynamically stable semiconducting compound composed of rubidium and sulfur.

RbS
Crystal structure of Rb2S
Ground-state structure · Materials Project
Overview

About Rb2S

Rubidium sulfide is a semiconducting binary compound that sits firmly on the convex hull, indicating high thermodynamic stability. Its structural chemistry is well-documented, with a wide variety of reported phases that highlight its significance in fundamental materials research.

As a member of the alkali metal sulfide family, this material serves as a key subject for understanding ionic bonding and electronic behavior in chalcogenides. Its stability makes it a reliable candidate for investigating the properties of sulfur-based semiconductors in controlled environments.

At a glance

Key Properties

Cross-validated computational properties for Rb2S, aggregated across 4 databases.

Band Gap

1.90–1.97 eV
Range across DFT structures

Energy Above Hull

0.000 eV/atom
Best (lowest) across sources

Stability

On hull (stable)
2 DFT sources

Structures

45
4 databases, 12 space groups
Validation

Cross-Source DFT Agreement

How well independent DFT databases agree on the thermodynamics of Rb2S. Tight agreement means computed properties can be trusted without re-running calculations.

Agreement Score

1.00 / 1.00
Trust tier: medium

Hull Spread

0.000 eV
EAH spread across sources

Sources Compared

2
jarvis, materials_project

Space Group Consensus

All match
Synthesis

Synthesis Routes

Literature-extracted synthesis procedures targeting Rb2S.

Solid State
Procedure available · ceder_solid_state
Solid State
Procedure available · ceder_solid_state
Uses

Applications

Where Rb2S is used.

Solid-state chemistry researchSemiconductor material studiesPrecursor for sulfide-based materials
Reference

Frequently Asked Questions

Common questions about Rb2S, answered from cross-validated data.

What is Rb2S?

Rubidium sulfide is a thermodynamically stable semiconducting compound composed of rubidium and sulfur.

More questions
What is Rb2S used for?
Rb2S is used in solid-state chemistry research, semiconductor material studies, and precursor for sulfide-based materials.
What is the band gap of Rb2S?
Rb2S has a DFT-computed band gap of 1.90–1.97 eV across 45 reported structures.
Is Rb2S a metal, semiconductor, or insulator?
With a band gap up to 1.97 eV it is a semiconductor.
Is Rb2S thermodynamically stable?
Yes — Rb2S sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
How many polymorphs of Rb2S are known?
45 structures of Rb2S are reported across 4 databases, spanning 12 distinct space groups.
How is Rb2S synthesized?
Literature-reported routes for Rb2S include solid state (2 procedures documented).
What elements does Rb2S contain?
Rb2S contains Rb and S (2 elements).
Where does the data for Rb2S come from?
Rb2S data is cross-referenced from latticegraph.
Comparison

How It Compares

As a stable binary sulfide, Rb2S serves as a benchmark for understanding the electronic and structural trends within the alkali metal chalcogenide class, providing a foundation for comparing the behavior of lighter or heavier group one sulfides.

Data sources & attribution
  • latticegraph — Lattice Graph Materials Intelligence Platform

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